P is the probability a value from this distribution lies between a & b. za and zb represent the z-scores of a & b.
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Avaldis 8: "P" equals Start integral from "z" Subscript, "a" , Baseline to "z" Subscript, "b" , Baseline , end integral, "N" left parenthesis, "x" , right parenthesis "d" "x"P=∫zbzaNxdx
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Avaldis 9: "z" Subscript, "a" , Baseline equals StartFraction, left parenthesis, "a" minus "m" , right parenthesis Over "s" , EndFractionza=a−ms
9
Avaldis 10: "z" Subscript, "b" , Baseline equals StartFraction, left parenthesis, "b" minus "m" , right parenthesis Over "s" , EndFractionzb=b−ms
